Fig. 4

(Color online) PC decay kinetics for InGaAs/GaAs sample with QWR at temperatures 82 and 290 K and probe wavelength of 980 and 650 nm. The calculated stretched exponential curve with τ _dec  = 3.3 ± 0.4 ms, β = 0.48 ± 0.02 at 82 К and τ _dec  = 2.1 ± 0.1 ms, β = 0.55 ± 0.02 at 290 К are shown (curve 1 and curve 2). For probe wavelength of 980 nm, the calculated exponential curve using function (2) with τ _dec  = 1.59 ± 0.02 ms at 290 K (curve 3) and τ _dec  = 3.7 ± 0.2 ms at 82 K (curve 4) are shown